54 
Thomas C. Barr, Jr. 
Figs. 29-31. Aedeagi of Trechus species, left lateral view: 29. T. bowlingi Barr, Mt. Kephart, 
North Carolina-Tennessee. 30. T. barben (Jeannel), Sassafras Knob, North Carolina-South 
Carolina. 31. T. tomtru Barr, Thunderhead (Mountain), Tennessee. 
Trechus bowlingi is limited to the Great Smoky Mountains, where it is 
a vicar species replacing the similar T. vandykei, T. tusqmtee , and T. 
haoe. Like the latter species, it occurs in a variety of habitats, such as 
moss carpets, rotting leaf litter, and wet soil beneath stones. Its 
altitudinal range is about 3000 to 6500 feet (900 to 2000 m). Along the 
crest of the central Smokies, between Newfound Gap and Clingmans 
Dome, it coexists with two other small species, T. barben and T. uncifer , 
and four larger species, T. nebulosus, T. valentinei, T. luculentus , and T. 
novaculosus. Characters useful in distinguishing T. bowlingi, T. barben , 
and T. uncifer are given elsewhere in the present paper in the discussion 
of T. uncifer. Among the four small species of the vandykei group, T. 
bowlingi is easily differentiated by the large aedeagus and the blunt, ob- 
tuse hind angles of the pronotum. 
Trechus (Microtrechus) barben (Jeannel) 
Fig. 30 
Microtrechus Barben Jeannel 1931:444, Figs. 55-57. Type locality, Retreat, 
Haywood County, North Carolina; type deposited in USNM. 
Trechus ( Microtrechus ) barben : Barr 1962:78. 
Trechus barben occupies a range which includes the Great Balsams and 
Pisgah Ledge, North Carolina, and extends southwestward to extreme 
eastern Tennessee, the mountains of northeast Georgia, and the South 
